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Acacia gibbosa

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Acacia gibbosa R.S.Cowan & Maslin, Nuytsia 10: 28 (1995)

Dense, rounded shrub or tree 1- 3 m high. Branchlets glabrous. Phyllodes narrowly linear, straight to shallowly incurved, terete, compressed or flat, 4- 9.5 cm long, normally 0.8- 1.5 mm wide, acute to acuminate with recurved to subuncinate tip, green to grey-green, glabrous, 8-nerved in all, 3-nerved per face when phyllodes flat, the nerves distant, plane and often brown-resinous, without anastomoses. Inflorescences simple, 2 per axil; peduncles 1.5- 4 mm long, glabrous, the caducous basal bract abaxially gibbose at base; heads obloid to short-cylindrical, 6- 8 mm long, 4- 4.5 mm diam., 22- 27-flowered, golden; bracteoles subpeltate with broadly oblate blade. Flowers 5-merous; sepals to 1/3-united. Pods linear, straight, to 6.5 cm long, 2- 2.5 mm wide, firmly chartaceous, glabrous. Seeds longitudinal, narrowly oblong-ovate, 2.8- 3 mm long, glossy, black; aril crested, inequilateral.

Occurs from Koorda and Kellerberrin E to the Coolgardie area and Dundas (c. 20 km due S of Norseman), inland south-western W.A. Grows mostly in loam in eucalypt woodland, scrub and shrubland.

Perhaps related to A. websteri which is readily distinguished by its consistently flat phyllodes 2- 3.5 mm wide with raised nerves which are more or less the same colour as the inter-nerve tissue (not obviously brown as in A. gibbosa ).

Type of accepted name

6.1 km NW of Southern Cross towards Bullfinch, W.A., 12 Aug. 1971, B.R.Maslin 1953 ; holo: PERTH; iso: CANB, G, K, MEL, NY.

[ Acacia cyperophylla auct. non F.Muell.: E.Pritzel, Bot. Jahrb. Syst . 35: 307 (1904) p.p. , as to L.Diels 5844 (PERTH fragment ex B)]

Representative collections

W.A.: Dundas, L.Diels 5844 (PERTH); c. 15 km N of Bruce Rock towards Merredin, B.R.Maslin 3417 (AD, CANB, K, MEL, P, PERTH); 10 km SW of Coolgardie, K.Newbey 5667 (CANB, PERTH).

(RSC & BRM)

WATTLE Acacias of Australia CD-ROM graphic

The information presented here originally appeared on the WATTLE CD-ROM which was jointly published by the Australian Biological Resources Study, Canberra, and the Department of Parks and Wildlife, Perth; it was produced by CSIRO Publishing from where it is available for purchase. The WATTLE custodians are thanked for allowing us to post this information here.

Page last updated: Friday 13 December 2019